Drilling machine



Malch 15, 1938.

C. A. HIRSCHBERG I DRILLING MACHINE;

Filed Feb. 19, 1936 2 Sheets-Sheet '1 Gnamss (-3., Hmawa Elm.

Marh l5,1938. C. A.HIRSCHBERG 2,111,213

DRILLING MACHINE Filed Feb. 19, 1936 2 Sheets-Sheet 2 A TTORNE l Patented Mar. 15, 1938 PATENT OFFICE v 7 2,111,213 DRILLING MACHINE Charles A. Hirschberg, Mountain Lakes, N. J., assignor to Worthington Pump and Machinery Corporation, New York, N. Y., a corporation of Virginia.

Application February 19, 1936, Serial No. 64,'789

2 Claims.

- v This invention relates to percussive tools or drilling machines of the type commonly known as stopersywherein the pressure fluid-operated drill is gradually fed to its work by a feed cylinder employed in conjunction with the drill and usually in substantial alignment therewith, and particularly to tools of this type which embody a tube through which fiuid passes for cleaning the drill holes.

Due to the manner in which such drillsoperate the cleaning fluid-conducting tube often becomes fouled, breaks or otherwise is affected so as to require its replacement.

It is an object of the present invention to provide a tool of this type in which such cleansing fluid-conducting tube may be readily and easily removed and repaired or replaced at the place where tool is working, without disengaging any I of the working parts of the tool; without exposing any of the working parts to mine or tunnel dust which might impair the operation of the tool, and in a minimum space of time with minimum effort on the part of the operator.

With these and other objects in view, as may appear from the accompanying specification, the invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a drilling machine of the preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings:

Fig. 1 is a side elevation of the improved drilling machine.

Fig. 2 is an enlarged detail in side elevation showing a different side of the tool or drilling machine.

Fig. 3 is a horizontal section on the line 3--3 of Fig. 1, looking upwardly.

Fig. 4 is a longitudinal section taken onithe line 44 of Fig. 2 and showing the tool in open position in dotted lines.

Referring more particularly to the drawings, the improved drilling mechanism or percussive tool includes the hammer engine I of any approved type, which operates the drill steel 2 for drilling, and the feed mechanism 3 which operates to feed the drill steel 2 and the entire drilling machine to its Work.

The hammer engine I may be of any approved construction including the cylinder 4 which is connected in any suitable manner to the valve block 5. The valve block 5 carries a throttle valve 6 which controls the feeding of the operating fluid to the hammer engine I and also controls the feeding of the operating pressure fluid to the cylinder I of the feed mechanism 3 for acting upon the piston 8 which is mounted for reciprocatory movement in the feed cylinder I and this piston acting through the anchoring point 9 and a surface or abutment I opposite to the surface which is being drilled, will force the drill steel 2 to its work and apply a constant feeding pressure to the cylinder 3 and the hammer engine I as is usual in the construction and operation of stopers or drilling machines of this type.

The drilling machine includes a tube I I through which cleansing fluid, either water or air under pressure, is delivered through the drill steel 2 for the purpose of cleaning the drill hole. The tube II is held in place in the valve block by a removable nut I2 and its companion structure, as clearly shown in Fig. 4 of the drawings. The tube II receives the cleansing fluid from a port I3, annular passage I4 and the duct or passage I5.

The pressure fluid for operating the feeding mechanism 3 passes from the throttle valve 6 through a, passage I6 formed in the valve block 5, a passage Il formed in the head I8 of the feed cylinder I, and through a suitable horizontal passage I9 into the cylinder I.

The tube I I which conducts the cleansing fluid to the drill hole frequently requires replacement or repair and for the purpose of facilitating such repair or replacement of this tube without disturbing any of the operating parts of the drilling machine and Without subjecting such parts to contact with tunnel or mine dust, the drilling machine is made in two sections with a tightfitting metal-to-metal joint between the undersurface of the valve block 5 and the upper surface of the head I8 of the feed cylinder I. The two sections of the drilling machine are swingably connected by means of an eye bolt 2!! which is in turn swlngably mounted upon a cross bolt 2| carried by suitable ears or bosses 22 formed on the valve block 5. A substantial U-shaped bracket 23 is formed on the head I8 of the cylinder I and its upstanding arms 24 are provided with substantially oval-shaped slots 25 through which the bolt 2| extends, thus providing a firm solid swingable connection between the hammer engine I and the feeding mechanism 3 so that the hammer engine may be swung into an open position as shown in dotted lines in Fig. 4

of the drawings, to permit ready removal of the nut l2 and consequently ready and easy removal of the tube H either for repair or replacement.

A locking bolt 26 is pivotally connected by means of its eye 21 and a suitable bolt or pin 28 to ears 29 formed on the feed cylinder head 18. The locking bolt 26 swings between suitable locking ears30 formed on the valve block and is clamped tightly in place for locking the sections of the tool tightly together by means of the nut 3| which is threaded on the locking nut 26 and tightly clamps against the upper sides of the ears 30.

The U-shaped bracket 23, ears 22 and the ears 30, and the locking nut 26 are all arranged so that when the locking nut is in looking position the joint between the undersurface of the valve block 5 and the upper surface of the feed cylinder head l3 will be tight and the passages l6 and I! in proper registration for delivering pressure fluid to the feed cylinder I of the feeding mechanism 3;

-It will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown but that they may be widely modified within the invention defined by the claims.

What is claimed is:

1. In a percussive tool, in combination, a valve block, a cylinder connected to the valve block, .a cleansing fluid-conducting tube detachably engaging the valve block and extending into said cylinder, a feed cylinder, a head on said feed cylinder, a substantially U-shaped bracket carried by said head, a pivoting bolt carried by said valve block and extending through the legs of said U-shaped bracket, an eye bolt rigidly carried by said bracket and having its eye engaged by said pivoting bolt, the legs of said U-shaped bracket provided with elongated openings to permit lateral movement of the pivoting bolt relative to the bracket.

2. In a percussive tool, in combination, a. valve block, a cylinder connected to the valve block, a cleansing fluid-conducting tube detachably engaging the valve block and extending into said cylinder, a feed cylinder, 2, head on said feed cylinder, a substantially U-shaped bracket carried by said head, a pivoting bolt carried by said valve block and extending through the legs of said U-shaped bracket, an eye bolt rigidly carried by said bracket and having its eye engaged by said pivoting bolt, the legs of said U-shaped bracket provided with elongated openings to permit lateral movement of the pivoting bolt relative to the bracket, and a locking bolt swingably carried by the feed cylinder and engaging the valve block to lock the valve block and feed cylinder in working position.

CHARLES A. HIRSCHBERG. 

